IntroductionAn impact of the COVID-19 pandemic on the emotions and behaviors of children has been found in several studies. However, this impact is not found in all studies. Attachment could be linked to different reactions and levels of anxiety. ObjectiveThe main aim of this study was to analyze the links between children's insecure attachment and variables related to anxiety, emotional and behavioral management of children during the pandemic. MethodStudy participants (n=83 parents and their child aged 6 to 12) completed anonymously online questionnaires assessing attachment insecurity, state-anxiety, coping strategies and emotional regulation. They also answered socio-demographic questions related to their context of life and experience of the pandemic. ResultsState-anxiety is significantly related to children's emotional dysregulation but not to emotion-oriented coping strategy. Significant links were observed between attachment insecurity on the one hand, and children's state-anxiety, emotion-oriented coping strategy and children's emotional dysregulation on the other hand. Emotional dysregulation mediates the link between disorganized attachment and state anxiety. ConclusionThe links between attachment insecurity and children's state-anxiety on the one hand, and the emotion-oriented coping strategy on the other hand highlight the importance of taking individual and interactional factors into account in children's socio-emotional manifestations during the COVID-19 pandemic.